public class one {
        public static void main(String[] args) {
            Student student1 = new Student();
            student1.name = "小明";
            student1.classId = 12;
            student1.stdentId = 1250;
            student1.address = "北京";
            student1.introduce();
            student1.study();
            Student student2 = new Student();
            student2.name = "张三";
            student2.classId = 13;
            student2.stdentId = 1301;
            student2.address = "山西";
            student2.introduce();
            student2.study();
        }
    }
